Which of the following components of the

dermis is incorrectly matched with its usual
function?
a. blood vessels; nutrient supply
b. sweat glands; hormone secretion
c. oil glands; lubrication of hair and skin
d. hairs; insulation
e. receptors; pain


B

Biology & Microbiology

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In this figure showing SDS-PAGE of the progressive stages of glycine N-methyltransferase purification, the marker lane indicates that the purified protein:

A. has approximately 32,000 amino acids. B. has a molecular mass of approximately 32,000. C. has a positive charge and a molecular mass of approximately 32,000. D. has a negative charge and a molecular mass of approximately 32,000. E. is only present when cells are induced with glycine.

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Which process refers to dramatic phenotypic changes that sometimes occur in evolution, such as the appearance of

feathered wings during the evolution of birds? a. gradualism b. allopolyploidy c. macroevolution d. paedomorphosis e. microevolution

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What is the last structure that a sperm travels through as it leaves the body?

A. Ureter B. Urethra C. Vas deferens D. Ejaculatory duct E. Epididymis

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Which piece of information is communicated by courtship displays?

A) The individuals are of the same species and of the opposite sex. B) The male represents a threat to other males. C) The individuals intend to hurt each other. D) The individuals are of different species.

Biology & Microbiology